Challenge for Shrike-Experts (1 Viewer)

[Corotauria]

A problem-bird out of Africa, Kenya, Hell's Gate National Park, on July 12th this year. It concerns a shrike we could not identify.

Description
The complete bird looks a bit like a Red-Backed Shrike, but was not it, because of several points.
-First of all the whole bird seems to be a bit bigger than a Red-Backed
-Very striking, the tail was to long for a Red-Backed. The length of his tail was around the same is the complete body-length!
-The grey head was darker, with only a small difference in colour with the very dark-brown back.
-The underparts seems to be white, and not with a pink wash over it
-In flight a striking white patch is visible on the primaries, but not up to the tip of the feathers. Also the tail is a very distinctive characteristic in flight!

A photo is added below, but not very clear because of the big distance and the angle on the bird. Hopefully someone can help me with this.

Rick

 

[Corotauria]

The only possibilty that I have heard sofar is a hybride between Red-Backed and Red-Tailed Shrike. But that doesn't explain the long tail... or does it? PLease, help is still needed.